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Since the return type of format() is not a Decimal, raise ValueError instead of 

InvalidOperation if the format specification (width, prec) exceeds the internal
limits of libmpdec.
This commit is contained in:
Stefan Krah 2013-01-24 15:22:33 +01:00
parent 33f7cdd975
commit eb8c451bd2
2 changed files with 11 additions and 11 deletions
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14
Lib/test/test_decimal.py
View File

@ -4971,22 +4971,16 @@ class CWhitebox(unittest.TestCase):
def test_c_format(self):
# Restricted input
Decimal = C.Decimal
InvalidOperation = C.InvalidOperation
Rounded = C.Rounded
localcontext = C.localcontext
HAVE_CONFIG_64 = (C.MAX_PREC > 425000000)
self.assertRaises(TypeError, Decimal(1).__format__, "=10.10", [], 9)
self.assertRaises(TypeError, Decimal(1).__format__, "=10.10", 9)
self.assertRaises(TypeError, Decimal(1).__format__, [])
with localcontext() as c:
c.traps[InvalidOperation] = True
c.traps[Rounded] = True
self.assertRaises(ValueError, Decimal(1).__format__, "<>=10.10")
maxsize = 2**63-1 if HAVE_CONFIG_64 else 2**31-1
self.assertRaises(InvalidOperation, Decimal("1.23456789").__format__,
"=%d.1" % maxsize)
self.assertRaises(ValueError, Decimal(1).__format__, "<>=10.10")
maxsize = 2**63-1 if HAVE_CONFIG_64 else 2**31-1
self.assertRaises(ValueError, Decimal("1.23456789").__format__,
"=%d.1" % maxsize)
def test_c_integral(self):
Decimal = C.Decimal

8
Modules/_decimal/_decimal.c
View File

@ -3222,7 +3222,13 @@ dec_format(PyObject *dec, PyObject *args)
decstring = mpd_qformat_spec(MPD(dec), &spec, CTX(context), &status);
if (decstring == NULL) {
dec_addstatus(context, status);
if (status & MPD_Malloc_error) {
PyErr_NoMemory();
}
else {
PyErr_SetString(PyExc_ValueError,
"format specification exceeds internal limits of _decimal");
}
goto finish;
}
result = PyUnicode_DecodeUTF8(decstring, strlen(decstring), NULL);